beginningReaders {languageR} | R Documentation |
Visual lexical decision with beginning readers
Description
Visual lexical decision latencies for beginning readers (8 year-old
Dutch children).
Usage
data(beginningReaders)
Format
A data frame with 7923 observations on the following 13 variables.
Word
- a factor for the words.
Subject
- a factor for the subjects.
LogRT
- a numeric vector with the log-transformed reaction time
(in ms).
Trial
- a numeric vector coding the rank of the trial in the
experimental list.
OrthLength
- a numeric vector coding the word's length in letters.
LogFrequency
- a numeric vector with log-transformed frequency in
Vermeer's frequency dictionary of Dutch children's texts.
LogFamilySize
- a numeric vector with the log-transformed morphological
family size count (with family members judged to be unknown to young children
removed).
ReadingScore
- a numeric vector with a score for reading proficiency.
ProportionOfErrors
- a numeric vector for the proportion of error responses for the word.
PC1
- a numeric vector for the first principal component of a PCA
orthogonalization of the preceding 4 reaction times
PC2
- a numeric vector for the second principal component of a PCA
orthogonalization of the preceding 4 reaction times
PC3
- a numeric vector for the third principal component of a PCA
orthogonalization of the preceding 4 reaction times
PC4
- a numeric vector for the fourth principal component of a PCA
orthogonalization of the preceding 4 reaction times
References
Perdijk, K., Schreuder, R., Verhoeven, L. and Baayen, R. H. (2006)
Tracing individual differences in reading skills of young children with
linear mixed-effects models. Manuscript, Radboud University Nijmegen.
Examples
## Not run:
data(beginningReaders)
library(lme4, keep.source = FALSE)
beginningReaders.lmer = lmer(LogRT ~ PC1 + PC2 + PC3 + ReadingScore +
OrthLength + I(OrthLength^2) + LogFrequency + LogFamilySize +
(1|Word) + (1|Subject) + (0+LogFrequency|Subject) + (0+OrthLength|Subject) + (0+PC1|Subject),
data = beginningReaders)
## End(Not run)
[Package
languageR version 0.953
Index]